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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a1dbb66b1e302a8bdc6371583794c16abc6a8a6f6a0b1b53776e17f5d2554b72' 
  AND token = 'oKOjnrqGV5GtBrfsT86kGyXsCsD72mFpgyDFhp2xhkg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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