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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e6e737634eb5c96155094f425f6d16aeef75416ee8a5b2e7c8660d6db6aca02' 
  AND token = 'a05husZYedJSVCDWLzxwOBTluxgnTmXKiYrUbiQwNgM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00065

JSON explain

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