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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82e77f06ebf84867c250e7ee308780e695cad9ae2c9b15a1e31286622abaca7a' 
  AND token = 'wHNmw3AC0g1epwP0O7VtyBIZCandFL19JjJN4ohjyOI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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