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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '386e4455a45b2aae427882cb4d3906d9fc586ad6ce7d37b5f53d636c0e4262d2' 
  AND token = 'LlKqZhgeJ8e3zxsqBk3Y6d6t/vBofE2mdiF2/vtmgNM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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