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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '698612738c5bedf4ecb1689b2561ca8d89c7bd34933dd2e707f8fe8af5d26950' 
  AND token = '+CcfFYFVgbyHpQ6Efn2cN0GE28tKi+oof/fMUuzLmw4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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