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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '14f5331a08403399eb06f66521e45f80887bd8417d84ebfb31192d1a6907d0d2' 
  AND token = 'bY0+90JLDMrACom/8Hg1OF1g3y898mbjO297FXvuK50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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