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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7819ca8027b49378d8b2b787ba61db62696694796b7f0814c907405d92e58dde' 
  AND token = 'WnJA2LgD1D7Ue42ZulvRUCEHaR6Gp6V7ShKB2SwJgwM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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