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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32fc820ef4c7fe9961024cd9cbf1cf34b49a06ea5bace9dab9deca4d44cbe2e1' 
  AND token = 'EnbdknoEeAb7zHmAj/YHZs1ZJkSpo7MLp3KHhjznSbo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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