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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ca2d36992bb2b1622abbbb82c1942ba5356614f4f858ff272726108ad08a92cc' 
  AND token = '+bjbCvhT+5+/hihHSwdLaUrtT6m54zarsmU7Bb1L0/Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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