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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e7253a299166857d9698de801c7d9f76438f2877537c8cd711445a8fefce688' 
  AND token = 'wIQs8IEVCdAXqxCDI2F+eMb/+mPxerBkTx/JL4U5osE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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