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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e322908d87032079993579fa59c258e430a3f2d3539fcc1924c88182a0cdad10' 
  AND token = 'sXv3De2T4vJNeA8wi+ZFwY+W81Vfm/nwPFwHyfhCQ1M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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