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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'aabee69a619aa8f693ca564fd6499692716c5e4a795eaa200f0a10619d9adc66' 
  AND token = 'R0p1orLdWJs0o8HaUQfDNQpM7Qn4ijEFKvdJadBB3sA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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