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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '85c4b94bc680096752a964f013ab6bd7eb6dba9d0bd65e5b86b925d4b5e715c9' 
  AND token = 'P8L4TFGHv2SUHEqOgywMLBGXgcLHtw2M3XFe7pGAk6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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