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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cd96468df220a5bba9f5a745db7710db3a0f771660c1613b1109075bae3a4f9' 
  AND token = '6COeUt2wp9e0lBo8A5EfACZyau8QvNsKyzH06+dvx9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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