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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6cb0b94c8d6a01b013f2ebde740f6613bd7ebb23df7919ccd2ac46a5dc01820e' 
  AND token = 'DSmB2J4r4O3MxKfNCgvNKLrPMYJf0C6nE3E+Tt43JxE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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