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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aa56411a414ea489dd5db1c50d5b606176c1da38485d3b4a112cfa7d4179d10d' 
  AND token = 'Oa+xMP4fdl6XzROLeubkzDiNknn/yawQ3AJC+MvKK2Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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