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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2e4b6410171c44babb097bf46d994eaf626064860161fe694a7a6bb36b28101e' 
  AND token = 'VcVvv4zpX5Jb6UkqsUlnosFrJz7covpeUdg6aMMCic0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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