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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eebec883879d49c9d00bd79cdfcb0e32645918aff689e8aa426c67f33f128c96' 
  AND token = '0Xxh0kKlVmST19+8VufaM3vr3S41nvdeaS2uV2QGobI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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