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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '051fe2224f085f9afe6e1f38f78c2ccce86b2fbf22ea1fb0992d401cebf59831' 
  AND token = 'gTK6y0BLM/2rMeou+b/O/i18cJVaSxtQk/0zWJtAI2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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