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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f38b8e6655a14b468e8c0c6e885e1e29bb8d65711f8ee5874c0f0250c9165f4' 
  AND token = 'ROKv7i3y59w6fuoVEw5y3gqUihxSScWqWU7DaMWli1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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