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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '580e8b806ca11374de45176546eaaa6d3e3d5bae98b5a6fd9e4fcdcec7a4c30e' 
  AND token = 'GTdq3rKGdhqAnYurjhOtIreCQ6h9E8Iz7lvSdWP/GtY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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