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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '285e21c1fb204078c3bdce0705836d0918e5c4e189b19bea053c2c95e76d7690' 
  AND token = 'gPk9g+x0qvYc/nStEPS9rcfS2TV5Iyu4wDr0i8PWLi0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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