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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ccdf1ce3faa0d9f4b344ff2b6edd3f772cbf4fd99a8e081e8f85a7f32c48be6d' 
  AND token = 'q6u2A71y42v6VZ/b1j9ieflIBZ9/K2tJGru0896hq6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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