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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '242ea82498c304da65ec33ebde4478f75cd76a5fae3f5462c4d5aa3ad050d61e' 
  AND token = 'gpPI/teROrnZoOkLm5QlF5tIdnoUugQ4VgtZPqmaWpI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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