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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca00bafd5002f4cf6913ad63b0ed01e8ec8ebeb4a5f8906e1f6650e5d3766128' 
  AND token = 'vz5vPBEoB9mbwWCdmvA+pYhtk8bL5rsq5OIGjOQBNZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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