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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a4e46c6bb90fbc5d9427682312ad264b3e1b2aa9dab2c639d95ae9b58ee031f' 
  AND token = '2BEeJJNWOFTqusjxCCt+89tfmLlALG34Y+bIRxXu7RY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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