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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22a75190bcd29b1b8da54331cea6c6f54b5d6db15abfa86dd9413819e684407e' 
  AND token = 'SOgjd/FXnxFkcv4YHD1iFOYeoeL/GeFGVFJc6jPFEYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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