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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32f78f0e9ad238dd0342a14f512c1f1ec8862858718caea68831d85203623e75' 
  AND token = 'HrCZfu/Qo94J5klYP2wIavOKC/FlyR8JdXHbspTKzAk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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