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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0651058f92ea9fc4a5201330b6c068daa60a29f2f16ebafe3bdea80e29e5a056' 
  AND token = 'hYzEb1YQHM2ItpEsYlLMdF25ropgSiaPm8jj3qmYZHA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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