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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e69da6bde5d056230bc59395519c6200942f127040ecc49c8d1dcbf477fe1fce' 
  AND token = 'RG1IeCP699fa7LOu/knPG5z3yCbWK9yTKMtTc6M08zw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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