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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd01c26ce525b0bb8d55b2b56f38f4f825f4cebae9753edf20eb02c0842851827' 
  AND token = 'm2Sz6vRNr15UpCehy7XCwnm+/fae/kZXC8H0tCPCDgE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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