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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9ed1479874a142eab80cfe01eac18bbf67f631a80b33f5b03b1f198a790eb774' 
  AND token = 'I6q9TKGkSdsN2A+pmgRfvu8hce5sibmLdqqNZM3SaCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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