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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f099f89d34f180faa918abe79544664c7530ce004cb735fced7585939ad9f741' 
  AND token = '40F7UYR+9C/2b+5GnEBfyxqAEf5plP8t2IroIl0sJSk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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