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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fc63100626b910b8d8797b3b70c3f9867d37077fec82fbb819a2ac36580b526' 
  AND token = 'G5G29wAysp3KzLy+9vK80LerytHIEvyPt+R+p+OF2rE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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