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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '64d65135d8b27b8588908c037579380f9da044f49433a0b0f60cd7d9dc2e712b' 
  AND token = '0Ox9jXOgDeI9xL0MvMCHiaiZ4g1XE0iplxMWmwwCeOE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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