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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56418be8ad55697949d22d8ff641c95a24e59ec6266d42ffda3d5d076052a983' 
  AND token = 'UrjhI/HW9U9Teo4V8jdIGXm6O746PS5/1Mj3KIYb4do=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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