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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11ba5963b1d9bc0a35187185bfbf1067b09d26773028bb35c9fa3ac0a1fa642b' 
  AND token = 'Z/CGEzohwP3SbFVAR5331QEy59fvv71pY9jH0FdWD+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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