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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b96125577705c8992c2ebb23ca391f4a33936bbf2435ec9a7123df998194c0c6' 
  AND token = 'uzVIqaw8y0yrBixko/l7tNPjirwzl1+E2Bk1US8A5CQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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