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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a04add95ec87d1486fa75e1e8392bc61fa7b9183d39ab03823af34a10b357165' 
  AND token = '8fxEF+Ji4zgeYGQ5Xhefq78lYXA7L1wyTLcoYT1XZnM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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