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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57f0ba53a2ae920e8f73799aac60ee3e7384f6799d2ca701595ddb708db52a97' 
  AND token = 'Y2ro1ZNycgNwoMVGgDrkUO2wKLSWSLmQi/P5ucr074w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00068

JSON explain

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