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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4091512592323093e211e0368b42cc3f866accde7763ea055fd97e837f6b0943' 
  AND token = 'xhhuHAWmRsS4Y52mjFhO7Hv7H4s4ujsB6NuS9e8uqu0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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