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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b64d39d37e716cb6992787bceba0acf9e3b76346622d091b4058bae3ce1afeb' 
  AND token = 'zcMzB1vE0sT7NsyRwoZu2KNzZgYeVeJ5uy0efDJAXvc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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