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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '64c832309e2e8dd8f2fef707ac0f2f2a012d8306a491718544c90aa36c34feae' 
  AND token = 'm03x1L8ZAfXhX5O2o85LHdk8An77LEOadSxyxFeb+VE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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