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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bafdb26b7ff7161b766e02150fc0698e3250be50198dc9e4aa384686088154de' 
  AND token = 'A2euFkA4HC6DrzzruBkNPT/f/vPP/ZdikpkHvnseZD8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00129

JSON explain

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