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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1e7bf3f1dc20863fe1c35fa1c83a910e6da747a538b1ad04d9caddd7aa507b1e' 
  AND token = 'nZUH13Y++07OQTpSeuxlFMj1Gpg2iLlQAIOoJOoLdzo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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