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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'be20f4cba769b2759eb1cde1d706fe8d7af05c9bc1dcdf2f219ee54ae8cd5a99' 
  AND token = 'EmMsqyt/jSAsRIYQak7yP3so/JkWcL/6cTwpH4TWMoY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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