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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7d184c60e16f558c5e10012808aa6862bc7fac59048a865056012d10ccdf9eb0' 
  AND token = 'JIXZbJZSABQvM/HBx+yhP1T2gkW2DH6U7tfkbJmxJPQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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