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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60d5e1906297be16888b64692f395ce39a30c3fe7774fc210820c51c658a0dd6' 
  AND token = 'Wsv4VrnYm66uBPJlsNevII9g3mv0zZASxPaHCQ1p4WE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}