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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd86f66399211e8afda8e2e559eb478b3ed288b0e502322c5fca86ab7c2504e0' 
  AND token = 'MoskWAhgHiiLtBNiNPDTggebD0QV6h2aF4XMOeRDDyM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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