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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '54295dcbe7261e485db14515deda676819632891d8c97d843505488a152499a5' 
  AND token = 'uxjQkvN1asQ87gR1tB74OdhHr3wOQPDi1jc3BKRik9s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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