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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '954384f7254e2f36e243d79f84d7e0e03291774f03c2072c5885d5e54e9897e3' 
  AND token = 'AFBdZL1onA0EoqMR8S8Jpd3TZAYOkyX/lFXGkTQWkKI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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