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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bdd40e5b86d80fe90064a326e7700f6643277dd5a2c930ef734ee6b0b1184bb9' 
  AND token = 'gzK+pdHEcay1lui5cSu4L3VUMOwFt+sW07cllNSoQuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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