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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab4224deb0516181c086ccc82f37d4d3290a08a0a28e3d391441b1cacea48ab3' 
  AND token = '0vZkRdLw29saL2+9+9gZHkKymvTOK9SoNir0xSfEyFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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