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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '01d314464c3acd9550d6150ed0f371d8d122413d9fcfe81242efbdf0a4f90b6b' 
  AND token = 'qUb6AlcYqYnWa6L4o2kTwkDUzR1yrM4mjUzuJfyeMkw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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