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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa5de696f88f368b72e0302ccb342077ef217e77ce6cf83428218acfdf9febbf' 
  AND token = 'sq9PupbCM4wtBVhJl3y8LB0zPiC41SQ0C7fPNa1UjPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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