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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '79088b4833e5592e5d3f73b2ca9705c01c3fa900b38efceda6bd2dc0e102cff2' 
  AND token = 'TylIekcK/KQIjTISpRKAgI1g+shIv645e8l82m/1rVY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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