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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aa9c26c0b40b2d855c0d574cc7b715a91e9c02c6db93c921d2412cd947a78d18' 
  AND token = '57J/qDsCrPL/0w6jEgsWXbUWcVx62Nt2VYi/265tmTY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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