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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a06c4d21531592541aa81672cecc2e22e2d3d0b8f65d80a6768937e7206938c5' 
  AND token = 'ui163M0nSuUlypH+kA+0jj2L8V1iFkUpyhpaz0b6GVE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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