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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa1ec24334e5952a5b402ec2a29cc58e01ac36000e621110dad1dec045fe9faf' 
  AND token = 'cG8eED2L/QERLGyaK0pYWdPE1JVyPRtrsZ+oDnsqWek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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