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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ef8912c4d88d75dad6943ce174b654ec0ed002e46d211848124e5080587c09ce' 
  AND token = 'ESY/l6C9tUEXA5hLuavYQ/HDQ/kQ8uA/bde9tXlBn+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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