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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '38d2e8b3eb4bcaa6ecc2f78e8cf2cacba0f5fa2ffc389d10869e967fa4404cf9' 
  AND token = 'Z+Q2Q5p1u/Yzi+Xu3Xg8my+OfUcZQ9wI3kJs9J7957k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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