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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1180bed8ca255dce74fc93098a254ea3cadd892bcbe56eb88a8956589660227c' 
  AND token = 'YLa/cW6ONf5EKfuCGJ8LUpHN2gwRU0o8oSRyY7JJih0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00088

JSON explain

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