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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7112a6717a435617c344f425246c8fd8ff1560bee9d0e159868a5cc7bba89d78' 
  AND token = 'wNvxPWFJJ3O9+LC46Q7A/Jf1kJ/tbFyXgM4/LlIykkY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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