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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89109476244d5b59a9d2b3c51d4528ac3d422becff865a9e3d385fd06b4374da' 
  AND token = 'Yf264q9FIaOkL6jKi6XSzLx4QFR5BlLvyy26DWUK6Ik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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