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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e90c9d1a00ecfa302709d8aa6660e0c9306a4dd61b82a6d3bfc4c9464682330' 
  AND token = 's1Z1tcnoWINVkPU1l8wDi5ofrczl25ELbZn6x1TL768=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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